Probing the Polarity of Sol-Gels and Ormosils via the Absorption of Nile Red View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2001-03

AUTHORS

Aleksandra Lobnik, Otto S. Wolfbeis

ABSTRACT

Conventional sol-gels are rather hydrophilic. A more hydrophobic material is obtained preparing organically modified siloxanes (ormosils). The polarity-sensitive probe Nile Red (NR) was doped in various sol-gels to probe their micro-polarity. The experiments show that the NR is an excellent probe and sensitive to the polarity of its microenvironment. Spectroscopic studies reveal remarkable changes in the absorption band positions and intensities as a function of the polarity of the sol-gel, which depends on the different precursors used. Furthermore, sol aging, gelation and temporal stability as a function of different ormosils have been investigated. More... »

PAGES

303-311

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1008734320809

DOI

http://dx.doi.org/10.1023/a:1008734320809

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1037881818


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